CN115075608A - Reinforced concrete foundation beam section-enlarged mechanical connection bar planting method - Google Patents
Reinforced concrete foundation beam section-enlarged mechanical connection bar planting method Download PDFInfo
- Publication number
- CN115075608A CN115075608A CN202210896840.5A CN202210896840A CN115075608A CN 115075608 A CN115075608 A CN 115075608A CN 202210896840 A CN202210896840 A CN 202210896840A CN 115075608 A CN115075608 A CN 115075608A
- Authority
- CN
- China
- Prior art keywords
- bar planting
- steel bar
- bar
- injection type
- type adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Piles And Underground Anchors (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
A bar planting method for mechanically connecting reinforced concrete foundation beams with enlarged sections comprises the following steps: positioning, drilling, cleaning holes, derusting steel bars, preparing an adhesive, planting steel bars, connecting sleeves, injecting glue for the second time, curing and inspecting. The injection type adhesive is injected into the steel bar planting drill hole by adopting an injector with an injection pipe extender in the steel bar planting process, then the steel bar is slowly and rotatably inserted into the steel bar planting drill hole, the injection type adhesive is kept to be filled in the steel bar planting drill hole, the injection pipe extender is simultaneously implanted into the steel bar planting drill hole along with the steel bar, a vacuum cavity is generated inside the steel bar planting drill hole in which the steel bar is implanted when the steel bar sleeve is installed, the injection type adhesive is injected into the vacuum cavity for the second time by utilizing the implanted injector extender, the injection type adhesive is slowly injected, the injection pipe extender is synchronously and slowly pulled out, and the injection type adhesive is filled in the vacuum cavity. The invention solves the problem that when the steel bar sleeve is connected, the steel bar is pulled out from the steel bar planting hole to form a cavity, so that the effective steel bar planting depth is reduced.
Description
Technical Field
The invention belongs to the technical field of construction of building structure reinforcing engineering, and particularly relates to a bar planting method for mechanically connecting an enlarged section of a reinforced concrete foundation beam in the building structure reinforcing engineering.
Background
In the construction process of building structure reinforcing engineering, because the bearing capacity of the original structure foundation is not enough, the foundation beam is required to be enlarged in section. The steel bars are inevitably required to be planted, the diameter of the stressed steel bars of the foundation beam is large, overlapping and welding cannot be adopted, and finally, mechanical connection can only be selected. Different from the newly-built structure, the reinforcing bar need be divided into two sections, implants the frame post at foundation beam both ends respectively in, need twist respectively in the sleeve when connecting because of the reinforcing bar, so at least one side drilling depth need be greater than the bar planting degree of depth that needs. Screw in the sleeve in-process, can lead to the downthehole vacuole formation of bar planting, bar planting glue can be adsorbed to the inside under the effect of atmospheric pressure, lead to effective bar planting degree of depth not enough. This is a common quality problem of two-end bar planting and middle sleeve connection. At present, the problem is not solved well in construction, and various standard atlas do not describe the phenomenon.
Disclosure of Invention
The invention aims to provide a bar planting method for mechanically connecting an enlarged cross section of a reinforced concrete foundation beam, which solves the problems that a cavity is formed in a bar planting drill hole and bar planting glue is absorbed inwards under the action of atmospheric pressure in the process of screwing a sleeve, so that the effective bar planting depth is not enough.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bar planting method for mechanically connecting reinforced concrete foundation beams with enlarged sections comprises the following steps:
1) positioning: the steel bar detector is matched with the original completion drawing to distinguish the position of the original structural steel bar and mark the position of the original structural steel bar; according to design requirements, the position of the embedded steel bar drill hole is marked in combination with the estimated position of the original steel bar;
2) drilling: adjusting the position of a bar planting drilling hole to avoid the original structural steel bar during drilling, wherein the diameter of the bar planting drilling hole is d + (4-10 mm), the depth of the bar planting drilling hole is 15d + the length/2 of a connecting sleeve, d is the diameter of the mechanically connected bar planting steel bar, and the length of the sleeve is the length of the mechanical sleeve matched with the diameter of the implanted steel bar;
3) hole cleaning: after the bar planting drilling is finished, immediately checking the hole depth and the hole diameter, blowing out dust in the bar planting drilling hole by using an air pump after the requirements are met, brushing the hole wall by using a hairbrush and cotton cloth with proper thicknesses, blowing the bar planting drilling hole by using the air pump again, repeating the operation for 3-5 times until no dust and debris exist in the bar planting drilling hole, and marking the waste bar planting drilling hole after the bar planting drilling hole is filled with an injection type adhesive to be abandoned;
4) derusting the steel bars: removing rust or oil stains within the anchoring length range of the steel bar to be implanted, and polishing to obtain metallic luster;
5) preparing an adhesive: preparing an injection type adhesive;
6) planting bars: injecting an injection type adhesive into the embedded steel bar drill hole by adopting an injector with an injection pipe extender and an automatic stirring injection cylinder, then slowly rotating and inserting the steel bar into the embedded steel bar drill hole to ensure that the injection type epoxy adhesive in the embedded steel bar drill hole is full, and simultaneously implanting the injection pipe extender into the embedded steel bar drill hole along with the steel bar;
7) sleeve connection and secondary glue injection: installing a steel bar sleeve, wherein the steel bar sleeve is installed to generate a vacuum cavity in a steel bar embedding drill hole for embedding a steel bar, an injector extender is embedded when the steel bar is embedded, an injection type adhesive is injected into the vacuum cavity for the second time, the injection type epoxy adhesive is slowly injected, the injector extender is synchronously and slowly pulled out, and the injection type adhesive is filled in the vacuum cavity and stops;
8) curing and maintaining: the curing of the injection type adhesive is carried out within the curing time of the curing of the injection type adhesive under the condition of keeping the curing temperature of the injection type adhesive, and the implanted steel bars are not disturbed in the curing process;
9) and (3) testing: after the injection type adhesive is cured, the in-situ anchoring bearing capacity test cannot be carried out, and the anchoring bearing capacity test of the test piece with the same condition as evidence needs to be carried out under the written approval of a design and supervision unit.
Further preferred technical solution: in the step 2), a percussion drill is adopted for drilling.
Further preferred technical scheme: in the step 3), the holes drilled with the embedded bars are kept dry, and after the brush is cleaned each time, a pressure air pump is needed to remove floating dust and loose small stones.
Further preferred technical scheme: in the step 4), the disc steel wire brush is adopted, power is utilized to drive the disc steel wire brush to rotate at a high speed, rust removal, oil removal and pollution removal are carried out on the steel bars which are not implanted, and the cleaning length is greater than the anchoring length by 5-8 cm; and sorting and stacking the cleaned non-implanted steel bars and protecting the cleaned part.
Further preferred technical solution: in the step 5), the injection type adhesive is an epoxy injection type adhesive.
Further preferred technical solution: in the step 7), the vacuum cavity is positioned at the bottom of the bar planting drill hole for implanting the steel bars, and the length of the vacuum cavity is 3-5 cm.
Further preferred technical solution: in the step 8), the curing temperature of the injection type adhesive is 5-25 ℃, and the curing time of the injection type adhesive is at least 3 days.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention can solve the problems that when the reinforced concrete foundation beam is connected with the reinforced sleeve, the reinforced bar is pulled out of the reinforced bar planting hole by 3-5cm, a cavity is formed, and the effective reinforced bar planting depth is reduced. Compared with the prior art, the method has the advantages that the accuracy of the rebar planting position is realized, and the effective rebar planting length is guaranteed.
Drawings
FIG. 1 is a schematic view of a reinforced concrete foundation beam with a bidirectional embedded bar connection according to the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
Reference numerals are as follows: 1-embedded steel bar, 2-sleeve, 3-foundation beam, 4-embedded steel bar drilling, 5-vacuum cavity,
6-syringe extender.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 2, now, taking a bidirectional bar-planting connection structure of a reinforced concrete foundation beam as an example, a technical scheme of a bar-planting method for mechanically connecting an enlarged cross section of a reinforced concrete foundation beam is described in detail, where the method includes:
Step 7, sleeve connection and secondary glue injection: the installation steel bar sleeve, the inside vacuum cavity of the planting bar drilling of the implantation reinforcing bar that installation steel bar sleeve caused, the utilization is installed steel bar sleeve as required, because of need to go into to the sleeve internal rotation and implant the reinforcing bar, must cause the reinforcing bar in the planting bar drilling to pull out outward, when the reinforcing bar pulls out outward, has covered epoxy injection formula adhesive on every side, so similar vacuum environment in the cavity, so need not set up the exhaust hole, and can form vacuum cavity in the planting bar drilling this moment. And the vacuum cavity formed by pulling out the steel bar is positioned at the bottom of the steel bar planting drill hole for planting the steel bar, and the length of the vacuum cavity is 3-5 cm. In this embodiment, the length of the vacuum cavity is 4 cm. And then, implanting the injector extender when the bar is implanted, injecting the injection type epoxy adhesive into the vacuum cavity for the second time, slowly injecting the injection type epoxy adhesive, synchronously and slowly pulling out the injector extender, and stopping filling the vacuum cavity with the injection type adhesive, namely, when the injection type adhesive is injected, sensing the pressure to indicate that the injection type adhesive is full, and stopping injection. In this embodiment, the injection adhesive is an epoxy injection adhesive.
Step 8, curing and maintaining: under the condition of keeping the curing temperature of the injection type adhesive, curing the injection type adhesive within the curing time of curing the injection type adhesive, and in the curing process, not disturbing the implanted steel bars; the curing temperature of the injection type adhesive is 5-25 ℃, the curing time of the injection type adhesive is at least 3 days, in the embodiment, the curing temperature of the epoxy injection type adhesive is 20 ℃, the curing time of the epoxy injection type adhesive is 3 days, and the implanted steel bar is kept undisturbed, namely, the implanted steel bar is ensured not to swing or collide in the curing process of the epoxy injection type adhesive.
And 9, checking: after the epoxy injection type adhesive is cured, the in-situ anchoring bearing capacity test cannot be carried out, and the test needs to pass written approval of design and supervision units and witness the anchoring bearing capacity test of the test piece under the same conditions. The reinforced concrete foundation beam needs to be embedded with steel bars at two ends and needs to complete mechanical connection within the operable period of the adhesive, so that the anchoring bearing capacity can not be tested in situ. And manufacturing test pieces under the same conditions at proper positions by a construction unit according to the same operation method, and carrying out anchoring bearing capacity inspection. The design unit and the supervision unit need to accept in writing and carry out on-site witness.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A bar planting method for mechanically connecting reinforced concrete foundation beams with enlarged sections is characterized by comprising the following steps:
1) positioning: the steel bar detector is matched with an original completion drawing to distinguish the position of the original structural steel bar, marks the position of the original structural steel bar, and marks the position and the model of the steel bar planting drill hole according to the design requirement and in combination with the estimated position of the original steel bar;
2) drilling: adjusting the position of a bar planting drilling hole to avoid the original structural steel bar during drilling, wherein the diameter of the bar planting drilling hole is d + (4-10 mm), the depth of the bar planting drilling hole is 15d + the length/2 of a connecting sleeve, d is the diameter of the mechanically connected bar planting steel bar, and the length of the sleeve is the length of the mechanical sleeve matched with the diameter of the implanted steel bar;
3) hole cleaning: after the bar planting drilling is finished, immediately checking the hole depth and the hole diameter, blowing out dust in the bar planting drilling hole by using an air pump after the requirements are met, brushing the hole wall by using a hairbrush and cotton cloth with proper thicknesses, blowing the bar planting drilling hole by using the air pump again, repeating the operation for 3-5 times until no dust and debris exist in the bar planting drilling hole, and marking the waste bar planting drilling hole after the bar planting drilling hole is filled with an injection type adhesive to be abandoned;
4) derusting the steel bars: removing rust or oil stains within the anchoring length range of the steel bar to be implanted, and polishing to obtain metallic luster;
5) preparing an adhesive: preparing an injection type adhesive;
6) and (3) bar planting: injecting an injection type adhesive into the bar planting drill hole by adopting an injector with an injection pipe extender and an automatic stirring injection tube, then slowly rotating and inserting the steel bar into the bar planting drill hole, ensuring that the injection type epoxy adhesive in the bar planting drill hole is full, and simultaneously implanting the injection pipe extender into the bar planting drill hole along with the steel bar;
7) sleeve connection and secondary glue injection: installing a steel bar sleeve, wherein the steel bar sleeve is installed to generate a vacuum cavity in a steel bar embedding drill hole for embedding a steel bar, an injector extender is embedded when the steel bar is embedded, an injection type adhesive is injected into the vacuum cavity for the second time, the injection type epoxy adhesive is slowly injected, the injector extender is synchronously and slowly pulled out, and the injection type adhesive is filled in the vacuum cavity and stops;
8) curing and curing: the curing of the injection type adhesive is carried out within the curing time of the curing of the injection type adhesive under the condition of keeping the curing temperature of the injection type adhesive, and the implanted steel bars are not disturbed in the curing process;
9) and (4) checking: after the injection type adhesive is cured, the in-situ anchoring bearing capacity test cannot be carried out, and a test piece under the same condition is manufactured at a proper position according to the same operation method to carry out the anchoring bearing capacity test.
2. The bar planting method for the enlarged-section mechanical connection of the reinforced concrete foundation beam according to claim 1, wherein the bar planting method comprises the following steps: in the step 2), a percussion drill is adopted for drilling.
3. The bar planting method for the enlarged-section mechanical connection of the reinforced concrete foundation beam according to claim 1, wherein the bar planting method comprises the following steps: in the step 3), the holes drilled with the embedded bars are kept dry, and after the brush is cleaned each time, a pressure air pump is needed to remove floating dust and loose small stones.
4. The bar planting method for the enlarged-section mechanical connection of the reinforced concrete foundation beam according to claim 1, wherein the bar planting method comprises the following steps: in the step 4), the disc steel wire brush is adopted, power is utilized to drive the disc steel wire brush to rotate at a high speed, rust removal, oil removal and pollution removal are carried out on the steel bars which are not implanted, and the cleaning length is greater than the anchoring length by 5-8 cm; and sorting and stacking the cleaned non-implanted steel bars and protecting the cleaned part.
5. The bar planting method for the enlarged-section mechanical connection of the reinforced concrete foundation beam according to claim 1, wherein the bar planting method comprises the following steps: in the step 5), the injection type adhesive is an epoxy injection type adhesive.
6. The bar planting method for the enlarged-section mechanical connection of the reinforced concrete foundation beam according to claim 1, wherein the bar planting method comprises the following steps: in the step 7), the vacuum cavity is positioned at the bottom of the bar planting drill hole for implanting the steel bars, and the length of the vacuum cavity is 3-5 cm.
7. The bar planting method for the enlarged-section mechanical connection of the reinforced concrete foundation beam according to claim 1, wherein the bar planting method comprises the following steps: in the step 8), the curing temperature of the injection type adhesive is 5-25 ℃, and the curing time of the injection type adhesive is at least 3 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896840.5A CN115075608B (en) | 2022-07-28 | 2022-07-28 | Reinforced concrete foundation beam enlarged section mechanical connection bar planting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896840.5A CN115075608B (en) | 2022-07-28 | 2022-07-28 | Reinforced concrete foundation beam enlarged section mechanical connection bar planting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115075608A true CN115075608A (en) | 2022-09-20 |
| CN115075608B CN115075608B (en) | 2023-07-18 |
Family
ID=83242093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210896840.5A Active CN115075608B (en) | 2022-07-28 | 2022-07-28 | Reinforced concrete foundation beam enlarged section mechanical connection bar planting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115075608B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522484A (en) * | 2022-09-30 | 2022-12-27 | 杭州鑫固建筑特种技术有限公司 | Secondary reinforcing bar planting improvement method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3892101A (en) * | 1972-06-26 | 1975-07-01 | Gd Anker Gmbh & Co Kg | Method of anchoring an anchoring bolt in a bore hole |
| CN101544482A (en) * | 2009-01-13 | 2009-09-30 | 鄢飞 | PTB inorganic environment-friendly inserted bar adhesive and method for using same |
| CN102486049A (en) * | 2010-12-06 | 2012-06-06 | 上海伙隆实业有限公司 | Filler wall masonry tie bar planting method |
| CN107060365A (en) * | 2017-05-12 | 2017-08-18 | 中冶建工集团有限公司 | The construction method of frame column opposite sides bar planting simultaneously |
| CN109098468A (en) * | 2018-09-11 | 2018-12-28 | 上海市建筑科学研究院 | Supplementary irrigation method is injected in drilling for sleeve grouting defect |
| CN110041869A (en) * | 2019-04-22 | 2019-07-23 | 苏州市姑苏新型建材有限公司 | A kind of modified epoxy injecting type anchoring adhesive and preparation method thereof |
| CN212836849U (en) * | 2020-06-23 | 2021-03-30 | 北京住总第一开发建设有限公司 | Planting rib anchoring structure |
-
2022
- 2022-07-28 CN CN202210896840.5A patent/CN115075608B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3892101A (en) * | 1972-06-26 | 1975-07-01 | Gd Anker Gmbh & Co Kg | Method of anchoring an anchoring bolt in a bore hole |
| CN101544482A (en) * | 2009-01-13 | 2009-09-30 | 鄢飞 | PTB inorganic environment-friendly inserted bar adhesive and method for using same |
| CN102486049A (en) * | 2010-12-06 | 2012-06-06 | 上海伙隆实业有限公司 | Filler wall masonry tie bar planting method |
| CN107060365A (en) * | 2017-05-12 | 2017-08-18 | 中冶建工集团有限公司 | The construction method of frame column opposite sides bar planting simultaneously |
| CN109098468A (en) * | 2018-09-11 | 2018-12-28 | 上海市建筑科学研究院 | Supplementary irrigation method is injected in drilling for sleeve grouting defect |
| CN110041869A (en) * | 2019-04-22 | 2019-07-23 | 苏州市姑苏新型建材有限公司 | A kind of modified epoxy injecting type anchoring adhesive and preparation method thereof |
| CN212836849U (en) * | 2020-06-23 | 2021-03-30 | 北京住总第一开发建设有限公司 | Planting rib anchoring structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522484A (en) * | 2022-09-30 | 2022-12-27 | 杭州鑫固建筑特种技术有限公司 | Secondary reinforcing bar planting improvement method |
| CN115522484B (en) * | 2022-09-30 | 2023-08-15 | 杭州鑫固建筑特种技术有限公司 | Secondary reinforcement bar planting improvement method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115075608B (en) | 2023-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115075608A (en) | Reinforced concrete foundation beam section-enlarged mechanical connection bar planting method | |
| CN110952996B (en) | Method and material for reinforcing electric power tunnel by fiber grid reinforced polymer mortar | |
| CN107989401A (en) | A kind of existing building external wall reconstruction structure and construction method | |
| CN111827879B (en) | Horizontal drilling construction method for large-diameter pipe shed in shallow-earth-covered weak stratum | |
| CN111042007A (en) | Planting rib anchoring method | |
| US20230349293A1 (en) | A support method of preset internal cable for in-situ tunnel expansion rpoject | |
| CN112709237A (en) | Construction method of anchor rod sash beam for high-speed slope protection | |
| CN115788508A (en) | Tunnel crack injection repairing method for tunnel engineering | |
| CN109322337A (en) | Cast-in-situ bored pile pile body defect-restoration method therefor | |
| CN111021772A (en) | Automatic detection and repair method for floor laying hollowing in building | |
| CN111005588A (en) | Local repair method for rammed earth wall | |
| CN109555329A (en) | Reinforcing construction process is transformed in building | |
| CN210238792U (en) | Connecting structure for joint of new and old concrete members | |
| CN108589706B (en) | Composite frozen soil steel pipe pile construction method | |
| CN104675135A (en) | Repairing method of carved stone cave eaves of stone cave temple | |
| CN113250703B (en) | Construction method of underground factory building roof arch under condition of extruding and crushing surrounding rock | |
| CN107044211A (en) | A kind of repairing and reinforcing process of sandwich insulation exterior wall glass sheet fiber tension member damage | |
| CN212078039U (en) | Layered resilience deformation measuring system for rock foundation blasting excavation | |
| CN116024960A (en) | Small-aperture pile slurry retaining wall pore-forming technology | |
| CN114808921A (en) | Recyclable spiral-advancing type anchor rod-microorganism grouting reinforcement device and method | |
| CN106593499A (en) | Construction method of prestressed anchor rods of underground powerhouse arch crown | |
| CN113818454A (en) | Slope reinforcing device and method for inducing directional growth of plant root system | |
| CN206310092U (en) | A kind of pipe connecting structure for accessing inspection shaft | |
| CN110670895A (en) | Toughness of masonry structure enhanced by combination of vertical steel plates and angle steel and construction method thereof | |
| CN220226776U (en) | Drilling aquifer well washing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |